package com.atguigu.gulimall.cart.controller;

import com.atguigu.gulimall.cart.service.CartService;
import com.atguigu.gulimall.cart.vo.Cart;
import com.atguigu.gulimall.cart.vo.CartItem;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import java.util.List;
import java.util.concurrent.ExecutionException;

/**
 * @Author : Jungle
 * @Description :
 */
@Controller
public class CartController {
    @Autowired
    private CartService cartService;


    @ResponseBody
    @GetMapping("/currentUserItems")
    public List<CartItem> getCurrentUserItems(){
        return cartService.getUserCartItems();
    }

    /**
     * 删除购物项
     */
    @GetMapping("/deleteItem")
    public String deleteItem(@RequestParam("skuId") Long skuId){
        cartService.deleteItem(skuId);
        return "redirect:http://cart.gulimall.com/cart.html";
    }

    /**
     * 更新购物项的数量
     */
    @GetMapping("/countItem")
    public String countItem(@RequestParam("skuId")Long skuId,
                            @RequestParam("num")Integer num){
        cartService.changeItemCount(skuId,num);
        return "redirect:http://cart.gulimall.com/cart.html";
    }
    /**
     * 更新购物项选中状态
     */
    @GetMapping("/checkItem")
    public String checkItem(@RequestParam("skuId") Long skuId,@RequestParam("check")Integer check){
        cartService.checkItem(skuId,check);
        return "redirect:http://cart.gulimall.com/cart.html";
    }

    /**
     * 浏览器有一个cookie  user-key：用来标识用户的身份，一个月后过期
     * 如果第一次使用京东购物车功能，都会给一个临时的用户身份
     * 浏览器以后保存，每次访问都会带上cookie
     * 没登录 ：按照cookie里面带来的user-key来做
     * 第一次如果没有临时用户，帮忙创建一个临时用户
     */
    @GetMapping("/cart.html")
    public String cartListPage(Model model) throws ExecutionException, InterruptedException {
        //1、快速得到用户信息，id,user-key
        //UserInfoTo userInfoTo = CartInterceptor.threadLocal.get();
        //System.out.println(userInfoTo);


        Cart cart = cartService.getCart();
        model.addAttribute("cart", cart);
        return "cartList";
    }

    /**
     * 添加商品到购物车
     * ra.addFlashAttribute()  将数据放到session里面可以从页面取出，但是只能取出一次
     * ra.addAttribute("skuId", skuId) 将数据拼接在url后面
     */
    @GetMapping("/addToCart")
    public String addToCart(@RequestParam("skuId") Long skuId,
                            @RequestParam("num") Integer num,
                            RedirectAttributes ra) throws ExecutionException, InterruptedException {
        cartService.addToCart(skuId, num);
        ra.addAttribute("skuId", skuId);
        return "redirect:http://cart.gulimall.com/addToCartSuccess.html";
    }

    /**
     * 跳转后的页面只是查询，不会做添加操作
     */
    @GetMapping("/addToCartSuccess.html")
    public String addToCartSuccessPage(@RequestParam("skuId") Long skuId, Model model) {
        //重定向到成功页面，再次查询购物车数据即可
        CartItem item = cartService.getCartItem(skuId);
        model.addAttribute("item", item);
        return "success";
    }
}
